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love history [14]
3 years ago
9

What are two scientific ideas that have changed throughout and why they have changed?

Biology
1 answer:
enyata [817]3 years ago
8 0
One is that the earth is shaped as a circle and two is that it is shaped as a square
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7 0
2 years ago
The movement of molecules from high concentration to low concentration is called
Sati [7]

Answer:

Diffusion

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4 0
3 years ago
Pain receptors are free nerve endings that respond to tissue damage and display sensory adaptation true or false
ANEK [815]
False.

Pain receptors are free nerve endings- nociceptors- that are stimulated by the chemical released from damaged tissue.
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3 years ago
HIV is a retrovirus. Which sequence does it use as part of its reproductive
Archy [21]
The answer must be A
8 0
3 years ago
What are the limitations to using electrophoresis to verify purity of a protein product?
9966 [12]
 SDS-PAGE electrophoresis is used to verify the purity of a protein product. Some of the limitations of this method are:
<span><span>·     </span>identification of a band on a protein gel is not always reliable because different polypeptides can have very similar molecular masses,</span>
<span><span>·     </span>band on a protein gel may mask the presence of more than one polypeptide,</span> <span><span>·     </span><span>presence of non-protein residues can affect the mobility of polypeptide and thus cause an error.</span></span>
6 0
3 years ago
Read 2 more answers
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